2004 Adobe Hills Swarm - Background Seismicity

Background seismicity 1984 to 2004 shown as grey dots.
Earthquakes of magnitude 3.0 or larger are shown as
open squares. Earthquakes since September 18, 2004 are
drawn in red. Moment tensor solutions 1993-2004 in
grey; events since September 18 drawn in red. Scroll
down to see a close-up of the swarm.

Close-up of seismicity in the Adobe Hills swarm. The NE trending
lineation in the swarm is clearly apparent in this figure, and is
consistent with the left-lateral moment tensor solutions.